Barometric draft control



E. B. MOORE B AROMETRIC DRAFT CONTROL Filed July 26, 1946 JN VEN TOR.

Patented July 12, 1949 2,475,799

UNITED STATES PATENT OFFICE.

BAROMETRIC DRAFT CONTROL Edward B. Moore, Kankakee, Ill., assignor to Sears, Roebuck and 00., Chicago, 111., a corporation of New York Application July 26, 1946, Serial No. 686,507 6 Claims. (Cl. 236-45) My invention relates to barometric draft contains a manually operable knob similar to a trols and has for a particular object provision radio tuning knob. of a draft control which may be manually ad- Secured to the ring 20 is a pivot rod 32 hingedly justed so that it will automatically control the mounting a circular damper plate 35 of a diamdraft for a variety of conditions.

Barometric draft controls of this general naameter of the ring 20. The plate 35 may be atture are well known and consist of a pivoted plate tached to the pivot rod by any suitable means the stack and thus to vary the opening of the 10 A weighting disc 38 may be secured to plate 35 damper to meet the existing draft conditions and as by soldering or welding.

compensate automatically for changes in outside It will be seen that the hinge pin 32 is so placed temperatures and wind conditions. However, it as to divide the damper plate 35 into a major is desirable that a barometric damper may be segmentA and a minor segment B. Creation of a my invention is to provide such'a manually adpendent on the amount of vacuum. justable barometric damper, which will maintain Should it be desired to adjust the damper, it itself at a given setting within narrow limits. may be manually rotated by knob 35] through the Another object of my invention is to provide 20 pinion and crank to a position where, instead of a device of the type referred to which will be being balanced as in the position shown in Fig. 2 simple in construction, inexpensive to fabricate the major segment A will depend to a greater and convenient to adjust. or less extent below the hinge pin 32. Obviously, Various other objects and advantages may sugwhen unbalanced, the vacuum will have to act gest themselves as the description proceeds. 5 upon greater at nal e fect than when the Referring now to the drawings forming a part p a i balancedh a lower vacu m Will of the specification and illustrating a preferred e f c as great a rotation in the balanced D embodiment of my invention: tion as will a greater vacuum in the unbalanced Fig. 1 is an elevational view showing a furnace position. and stack with a control device embodying my 3 The gear and pinion arrangement permits adlnvention mounted in the latter; justment with a minimum of effort.

Fig. 2 is an elevational view of the damper Various changes may suggest themselves to itself on an enlarged scale; those skilled in the art, and hence I do not wish Fig. 3 is a fragmentary sectional view substanto be limited to the specific forms shown or uses tially along the line 33 of Fig. 2; 36 mentioned, except to the extent indicated in the Fig. 4 is a top plan view of the same, partly in appended claims. section; and I claim: Figure 5 is a fragmentary sectional view sub- 1. In combination, means for controlling the stantially along the line 55 of Figure 2. draft in combustion apparatus comprising a cir- The numeral l0 indicates a conventional heat- 40 cular damper, means for mounting said damper ing furnace Which may be of the warm air or in a flue comprising a ring having peripheral other desired type and having a flue I2 connected teeth thereon, a hinge pivotally securing said thereto. Arranged in the flue is a damper section damper to said ring, said hinge being oifset from I3 having a neck I 5 extending laterally subthe center of said damper, a pinion cooperating stantially at right angles to the major portion with said teeth for rotating the damper in its of the flue l2. own plane so as to shift the angular position of Secured in the neck I5 is an annular collar 5 said hinge, and means for manually rotating said having integral therewith an annular flange I1. pinion. Rotatably mounted in the flange I1 and retained 2. Means for controlling the draft in combusby ears 40 is a cast ring 20 which may be protion apparatus comprisinga circular collar adaptvided on part of its periphery with teeth 22. ed to be inserted in a flue, a ring having a plu- These teeth are adapted to engage with a pinion rality of teeth thereon, said ring being rotatably 25 journaled in a plate 26 mounted above the mounted in said collar, a hinge pin ecce collar l6 and preferably integral therewith. The carried by said ring, a weighted dam pinion 25 is provided with a boss 28 which repivotally mounted on said hinge pin,

operatively connected to said ring, and means for manually rotating said pinion.

3. A combination as defined in claim 2 wherein said damper plate has a weight secured to the central portion thereof.

4. A combination as defined in claim 2 wherein said damper plate has a weight in the form of a disc secured substantially centrally thereto.

5. A combination as defined in claim 2 wherein the collar is relatively shallow in depth and has a plurality of spaced ears retaining said ring against outward displacement, said pinion being carried by a support carried by and extending radially from said collar.

6. Means for controlling tion apparatus comprising a ed to be inserted in a flue the draft in combuscircular collar adaptand formed to define a channel, a ring journaled in said channel, a hinge pin eccentrically carried by said ring, a weighted damper plate pivotally mounted on said hinge pin, a rotary member bearing on said ring and offset radially therefrom, whereby said ring may be rotated in said channel, and a handle for actuating said rotary member.

EDWARD B. MOORE.

REFERENCES CITED The following references are of record in file of this patent:

UNITED STATES PATENTS Name Breese the Date

Number May 1'7, 192'? 

